參數(shù)資料
型號: LSI53C860
英文描述: LSI53C860 PCI to Ultra SCSI I/O Processor technical manual v2.1 4/01
中文描述: LSI53C860 PCI到超的SCSI I / O處理器技術(shù)手冊2.1 4 / 01
文件頁數(shù): 80/166頁
文件大小: 1330K
代理商: LSI53C860
3-32
SAF-TE Source Code
Table 3.8
TWS Low-level Subroutines
Low-Level Subroutines
Functional Description
tws_setup(bus)
Initialize pointers to TWS registers. Must be
called prior to any TWS data transfers.
If Bus 0:
tws_data_ptr
= TWS_0_DATA (0xFD00)
tws_csr_ptr
= TWS_0_CSR (0xFD01)
If Bus 1:
tws_data_ptr
= TWS_1_DATA (0xFD02)
tws_csr_ptr
= TWS_1_CSR (0xFD03)
Return None.
tws_init
(bus speed, ID on bus)
Initialize the clock speed for specified bus
and ID.
Return None.
tws_poll_pin()
Return TRUE if Data Register completed
operation, FALSE if operation failed.
tws_poll_bb()
Return TRUE if bus free, FALSE if bus busy.
tws_poll_lrb()
Return TRUE if Last Received Bit (the ACK)
is logical 0 (successful) or FALSE otherwise
(failure).
tws_memory_write
(chip ID, address, number of
bytes to transfer, pointer to a
buffer)
Invoked only on a code load operation.
Parses the data to be written into small
groups (1–64 bytes) and repeatedly calls the
TWS write routine.
tws_write
(chip ID, address, number of
bytes to transfer, pointer to a
buffer)
With the pointers to the bus initialized, this
function writes the number of bytes from the
given buffer to the specified address and chip
ID.
tws_read
(chip ID, address, number of
bytes to transfer, pointer to a
buffer)
With the pointers to the bus initialized, this
function reads from the address and chip ID,
the specified number of bytes and stores the
data into the given buffer.
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